On the other hand, Hipparchus understands by the term _touching_, that the Mediterranean, being over-full, flowed into the Erythræan Sea, and he inquires how it could happen, that as the Mediterranean flowed out by this new vent at the Pillars of Hercules, the Erythræan Sea, which was all one with it, did not flow away too, and thus become lower, but has always retained the same level? and since Eratosthenes supposes the whole exterior sea to be confluent, it follows that the Western Ocean[357] and the Erythræan Sea are all one; and thus [remarks Hipparchus] as a necessary consequence, the sea beyond the Pillars of Hercules, the Erythræan Sea, and that also which is confluent with it,[358] have all the same level. 14. But, Eratosthenes would reply, I never said that, in consequence of the repletion of the Mediterranean, it actually flowed into the Erythræan Sea, but only that it approached very near thereto: besides, it does not follow, that in one and the self-same sea, the level of its surface must be all the same; to instance the Mediterranean itself, no one, surely, will say it is of the same height at Lechæum[359] and at Cenchrea.[360] This answer Hipparchus anticipated in his Critique; and being aware of the opinion of Eratosthenes, was justified in attacking his arguments. But he ought not to have taken it for granted, that when Eratosthenes said the exterior sea was all one, he necessarily implied that its level was every where the same. 15. Hipparchus rejects as false the [account] of the inscription on the dolphins “by the delegates from Cyrene,” but the reason he assigns for this is insufficient, viz. that though Cyrene was built in times of which we have record, no one mentions the oracle,[361] as being situated on the sea-shore. But what matters is that no historian has recorded this, when amongst the other proofs from which we infer that this place was formerly on the sea-shore, we number this of the dolphins which were set up, and the inscription, “by the delegates from Cyrene?”[362] Hipparchus agrees that if the bottom of the sea were raised up, it would lift the water with it, and might therefore overflow the land as far as the locality of the oracle, or more than 3000 stadia from the shore; but he will not allow that the rising would be sufficient to overflow the Island of Pharos and the major portion of Egypt, since [he says] the elevation would not be sufficient to submerge these. He alleges that if before the opening of the passage at the Pillars of Hercules, the Mediterranean had been swollen to such an extent as Eratosthenes affirms, the whole of Libya, and the greater part of Europe and Asia, must long ago have been buried beneath its waves. Besides, he adds, in this case the Euxine would in certain places have been connected with the Adriatic, since in the vicinity of the Euxine, [near to its source,][363] the Ister is divided in its course, and flows into either